Sectional boiler.



PATENTEDT'JULY 14, 1903.

J. G. WAGSTAFF.

SECTIONAL BOILER.

APPLIOATIOH FILED JUNE 17. 1902.

5 SHEETS-SHEET 1.

R0 MODEL PATBNTED JULY 14, 1903.

I J. G. WAGSTAFF.

SECTIONAL BOILER.

APPLICATION IILED JUN}; 17, 1902.

5 SHEETS-SHEBT 3- N0 MODEL.

We MM No. 733,688. PATENTED JULY 14, 1903. J. G. WAGSTAFF.

SEOTIONAL BOILER.

APPLICATION FILED JUNE 17, 1902.

N0 MODEL. 5 SHEETS-$111231 4- 4 hunt/m w Jm/ma 4%170 T onms PEfiHS co.PHOYOLITMO. wumluewu u c No. 733,688. PATENTED JULY 14, 1903.,

J.- G. WAGSTAPP. 'SEGTIONAL BOILER.

APPLICATION FILED JUNE 17, 1902.

N0 MODEL. 5 SHEETS-SHEET 5.

UNITED STATES Patented July 14, 1903.

PATENT OFFICE.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent No. 733,688, dated July 14,1903.

Application filed June 17, 1902. Serial No. 112,110. (No model.)

T0 (all whom, it may concern:

Be it known that I, JOSHUA GEORGE WAG- sTAFF,heatingandventilatingengineer,asubject of the King of Great Britain and Ireland, of The AlmaIron Works, Dukinfield, in the county of Chester, England, have inventedcertain new and useful Improvements in Sectional Boilers for HeatingWater or Generating Steam, (for which I have made an application forpatent in Great Britain, No. 23,594, dated November 21, 1901,) of whichthe following is a specification. 7

My invention relates to sectional boilers used for heating water forradiators or other purposes or for generating steam, as is wellunderstood.

The object of my invention is to construct the sections of such a boilerso as to offer very large area of heating-surface in the firebox andfines, free circulation for the hot gases in a transverse and verticaldirection, and of such a shape that the gases will ascend in intimatecontact with the whole, or practically the whole, surface of thesections.

The accompanying drawings clearly illustrate my invention.

Figure 1 is a front elevation of one of the sections of the boiler. Fig.2 is an end view looking in the direction of the arrow marked J, Fig. 1.Fig. 3 is a sectional elevation of the section. Fig. 4 is an end viewfrom the end marked R, Fig. 3. Fig. 5 shows on the left hand ahalf-front elevation of the boiler, and on the right hand a half-sectionthrough the line K L, Fig. 7. Fig. 6 is a sectional side elevation, theportion marked with the bracket 1W1 being taken through the line G H andthe part marked with the bracket M through the line G H, Fig. l, and thepart marked N being taken through the line A B, Fig. 1. Fig. 7 is a planview, partly in section, showing the various sections of the boilerassembled together, the back portion a, one of the intermediate sections1), and the front section 0 being shown in a section taken through theline C D, Figs. 1 and 5, another intermediate section 2 being shown insection on the line E F, Fig. 1.

Each tubular section is cast in two separate identical halves, and eachhalf consists of an outer vertical tube f and head g branching inward,which carries an upper chamber,

Fig. 7.

tend about half-way across the width of the upper chamber, as shown inFig. 1. The upper chamber is further subdivided above the projection hby means of a narrow slit or aperture 2', which divides the upperchamher into two short vertical tubes j k and serves to permit theinsertion of an angle or cranked cleaning-brush. When the sections areplaced in position and bolted together by bolts Z, (see Figs. 5 and 7,)the halves of each section are arranged right and left hand, and anumber of side vertical tubes f are thus obtained, the heads g'of thevertical tubes and upper chambers projecting inward, and forming a rooffor the fire and smoke chamber. The ends of the bottom projections h,formed on the upper chambers, are placed together and provide a centralvertical passage m between the inwardly-arranged npper chambers, leadingto a suitable smoke boX and flue n, formed at the top of the series ofsections. The sections are connected together by suitable joints 0 atthe two outer corners and at the bottom 1) of the vertical tubes, thusforming four joints for each complete section. By connecting thesections at the top corners instead of centrally, as usual, theconstruction will allow of numbers of outlet connections being takentherefrom at a much lower level than if the connection was at thecenter. To form a gastight joint, the outer edges of t-he'sections areprovided with a web q, so that when the webs of adjoining sections arebrought together a perfect joint can be easily attained by the use ofcement or the like, which will be more clearly seen from an inspectionof Such being the general construction and arrangement of the tubularsections I will now describe the shape in cross-section of such tubes,whereby I am enabled to subject practically the entire area of suchtubes to the action of the fire and ascending gases.

The vertical tubes f1 form of triangular shape in cross-section, thebase of the triangle being at the extreme outer edges of the sections atthe point of junction with the adjoining sections, the apex of thetriangle being arranged inward. Instead of inducing a draft horizontallythroughout my improved water-heater I arrange for the flames and gasesfrom the fire to ascend vertically. At each side of the fire, therefore,the rows of triangular-shaped tubes form a series of triangular recessesor shafts 1*, (shown clearly in the plan View, Fig. 7,) up which thegases are induced, so that the entire area of the vertical tubes f is inintimate contact with the hot gases. The headsg of the vertical tubesare formed in the shape of a triangle with the apex downward, (see Fig.6,) so that the ascending gases meet the apex and pass upward at eachside of and in contact with the entire area of the horizontal heads ofthe vertical tubes. The gases are deflected by the bottom projections hto enter the upper chambers of the sections toward the sides thereof,afterward being drawn to the center by the central flue, as indicated bythe arrows in Fig. 5. The two vertical tubes j is forming the upperchamber are also triangular in cross-section, (see Fig. 7,) each onebeing arranged with apex toward the dividing-slit. The ascending gasesare deflected by the bottom projections h of the upper chamber and passto the smoke chamber and flue, the upper short tubes offering theirentire surface to the contact of the gases. I thus obtain a largecontact-surface and free circulation of the gases, also verticalcirculation of water throughout the system. There is no liability tobreakage by contraction, and in addition to economy in point ofconstruction there is freedom for expansion and contraction of thevarious sections when assembled.

Although I have instanced triangular tubes in cross-section, it will beunderstood that raaess that shape may be varied, as the tubes may berectangular, square, or round ended. In the case of a steam-generatorthe tubes of the upper chamber might be formed square, as shown incross-section at 0, Fig. 6, so as to increase the heating-surface andfluid-space.

Thevarious sections when assembled are provided with asuitablefire-grate S, and front and back water sections 0 a with fire-doors,flue-doors, water inlets and outlets, and the like, and stand t tocomplete the boiler, although as these form no part of my invention itis unnecessary to enter into details thereof.

I declare that what I claim is A sectional boiler having a transverseand vertical draft for heating water or generating steam, formed insections made in identical halves each separate section comprising avertical tube, recesses or shafts between the vertical tubes, a headbranching inward, a deflecting-rib at the upper part of the head and anupper chamber divided into two vertical tubes, the tubes of the sectionsbeing formed at their outer edges with a web to effect the junction ofthe sections, a fire-grate, a smoke box and fine formed at the top ofthe series of sections, a front Water-section having a fire-door andflue-doors, a back watersection and stand the sections being incommunication with each other at the top outer corners and the bottomcorners, the sections of the boiler being placed back to back,substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JOSHUA GEORGE WAGSTAFF.

Witnesses:

JOSHUA ENTWIsLE, ALFRED YATES.

